As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING MAINTENANCE, FOUND MAINTENANCE MESSAGE 75-20391, FOR THE VSV POSITION SIGNAL IS OUT OF RANGE. LONG TERM FAULT ON NR 1 ENGINE. ACFT GROUNDED. FIM 75-31 TASK 803 ACCOMPLISHED VSV ACTUATOR CHANNEL B (LEFT SIDE) RESISTANCE OUT OF LIMITS. REMOVED AND REPLACED THE LT VSV ACTUATOR IAW AMM 75-31-01-00-801-F00, AND AMM 75-31-01-400-801-F00.